Moffitt Cancer Center's Personalized Medicine Clinical Service (PMCS) reviews somatic next-generation sequencing (NGS) assay results, provides interpretations, and identifies potential therapeutic options. The number of individuals reviewed by our clinical service who are eligible for on-label or off-label drug therapy based on genetic test results has previously not been quantitated. Herein, we determined the number of patients harboring an actionable mutation that would qualify a patient for an on-label drug or consideration for off-label drug treatment.
The Food and Drug Administration (FDA) Table of Pharmacogenomic Biomarkers in Drug Labeling was utilized to identify anticancer agents containing genomic markers in the indications and usage section of the drug label. A database containing discrete NGS patient data was retrospectively queried for those drugs and associated genomic mutations included in this study. On-label was defined as those patients who were eligible for a drug based on harboring a targetable mutation in the FDA approved cancer type. Off-label was defined as those patients who may be considered for a drug based on harboring a targetable mutation in a non-FDA approved cancer type.
A total of 1,072 patients and 1,131 NGS results were eligible for study inclusion. Fifty-two patients (4.9%) had results for more than one NGS assay. Seventeen drugs targeting ALK, BRAF, BRCA1/BRCA2, EGFR, or ERBB2 mutations met the study inclusion criteria. Of the entire patient population, 92 (8.6%) unique patients were eligible for at least one on-label drug while off-label use of at least one drug could be considered in 103 (9.6%) unique patients.
Combining both on-label and off-label opportunities, 175 (16.3%) unique patients had actionable mutations in 6 genes. Because most patients reviewed by our PMCS have previously treated advanced disease with limited treatment options, identifying additional lines of therapy is of clinical utility. This article is protected by copyright. All rights reserved.
This article is protected by copyright. All rights reserved.
Personalized medicine; off-label drugs; oncology; pharmacogenomics; precision medicine
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